<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1=== 0? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id" >
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag> 
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2===0 ?'':'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" >
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                         <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作">
                    <template slot-scope="scope" width="300px">
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRolesById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加用户角色 -->
        <el-dialog
            title="添加用户角色"
            :visible.sync="addDialogVisible"
            width="50%" @close="addDialogClosed">
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRulesRef" label-width="80px" >
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户角色 -->
        <el-dialog
            title="修改用户角色"
            :visible.sync="editDialogVisible"
            width="50%" @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%" @close="setRightDialogClosed">
           <!-- 树形控件 -->
           <el-tree show-checkbox :data="rightslist" :props="treeProps" node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights ">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default{
    data(){
        return{
            // 所有角色列表数据
            rolelist:[],
            addDialogVisible: false,
            // 添加用户角色
            addForm:{
                roleName:'',
                roleDesc:''
            },
            // 添加表单验证规则
            addFormRules:{
                roleName:[
                    {required: true,message:'请输入角色名称' ,trigger:'blur'}
                ],
                roleDesc:[
                    {required: true,message:'请输入角色描述' ,trigger:'blur'}
                ]
            },
            // 控制修改用户角色对话框的显示与隐藏
            editDialogVisible:false,
            // 查询用户对象信息
            editForm:{},
            // 修改表单的验证规则对象
            editFormRules:{
                roleName:[
                    {required: true,message:'请输入角色名称',trigger:'blur'}
                ],
                roleDesc:[
                    {required: true, message: '请输入角色描述',trigger:'blur'}
                ]
                
            },
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            // 所有权限的数据
            rightslist: [],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId:''

        }
        
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
       async getRolesList(){
            const{data: res} =await this.$http.get('roles')
            if(res.meta.status !==200){
                return this.$message.error('获取角色列表失败！')
            }
            this.rolelist =res.data
            console.log(this.rolelist)
        },
        // 监听用户角色对话框关闭事件，清空数据
        addDialogClosed(){
            this.$refs.addFormRulesRef.resetFields()
        },
        // 点击按钮添加用户角色
        addRoles(){
           this.$refs.addFormRulesRef.validate(async valid=>{
               if(!valid)return
              const{data:res} = await this.$http.post('roles',this.addForm)
              if(res.meta.status !==201){
                  this.$message.error('添加角色失败！')
              }
              this.$message.success('添加角色成功！')
                // 隐藏添加对话框
                this.addDialogVisible=false
                // 重新获取用户角色
                this.getRolesList()
           })

        },
        // 展示编辑角色的对话框
        async showEditDialog(id){
            console.log(id)
           const{data:res} =await this.$http.get('roles/'+id)
           if(res.meta.status !==200){
               return this.$message.error('查询用户失败！')
           }
           this.editForm =res.data
        //    connsole.log(this.editForm)
           this.editDialogVisible =true
        },
        // 监听修改角色对话框的关闭事件
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        // 修改用户信息并提交
        editRolesInfo(){
            this.$refs.editFormRef.validate(async valid=>{
                // console.log(valid)
                if(!valid) return
                const{data:res} =await this.$http.put('roles/'+this.editForm.roleId,{roleName:this.editForm.roleName,roleDesc:this.editForm.roleDesc})
                console.log(res);
                if(res.meta.status !==200){
                    return this.$message.error('更新角色失败！')
                }
                // 关闭对话框
                this.editDialogVisible=false
                // 刷新数据列表
                this.getRolesList()
                // 提示修改成功
                this.$message.success('更新用户信息成功')

            })
        },
        // 根据id删除用户角色信息
        async removeRolesById(id){
            // console.log(id)
            const confirmResult=await this.$confirm('此操作将永久删除该用户角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err=>err)
            // 如果用户确认删除，则返回值为字符串confirm
            // 如果用户取消了删除，则返回值为字符串cancel
            // console.log(confirmResult);
            if(confirmResult !=='confirm'){
                return this.$message.info('已取消删除')
            }
            const{data:res} =await this.$http.delete('roles/'+id)
            if(res.meta.status !==200){
                return this.$message.error('删除角色失败！')
            }
            this.$message.success('删除用户成功')
            this.getRolesList();
            // console.log('确认了删除')
        },
        // 根据id删除对应的权限
       async removeRightById(role,rightId){
            // 弹框提示用户是否要删除
          const confirmResult= await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err=>err)
            if(confirmResult != 'confirm'){
                return this.$message.info('取消了删除')
            }
          const{data: res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
          if(res.meta.status !=200){
              return this.$message.error('删除权限失败！')
          }
        //   this.getRolesList()
           role.children=res.data
        },
        // 展示分配权限的对话框
       async showSetRightDialog(role){
           this.roleId=role.id
            // 获取所有权限的数据
           const{data:res} =await this.$http.get('rights/tree')
           if(res.meta.status !==200){
               return this.$message.error('获取权限数据失败！')
           }
        //    获取到的权限数据保存到data中
           this.rightslist=res.data
           console.log(this.rightslist)
        //    递归获取三级节点的id
            this.getLeafKeys(role,
            this.defKeys)
            this.setRightDialogVisible=true
            
            
        },
        //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node,arr){
            // 如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>
            this.getLeafKeys(item,arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys =[]
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
           const idStr=keys.join(',')
          const {data: res} =await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
          if(res.meta.status !==200){
              return this.$message.error('分配权限失败！')
          }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible=false
        }

    }
}
</script>
<style lang="less" scoped>
.el-tag{margin:7px;}
.bdtop{border-top: 1px solid #eee;}
.bdbottom{border-bottom: 1px solid #eee;}
.vcenter{display: flex; align-items: center;}
</style>